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u � <br /> 33 <br /> A �e <br /> Table 2. Comparison of Benzene Concentrations in Groundwater for Six <br /> Quarterly Sampling Events, MHY 1988 through August 1989 <br /> 5 7 <br /> Benzene (ug/1), Benzene (u9/1), Benzene 09/1) y Benzene (ug/1) v9�� <br /> Benzene (ug/1), Benzene (ug/1), November 28 and February 27, 28, and May 30 August 22, 23, b'_ <br /> Sample May 2, 1988 August 26, 1988 29, 1988 March 2, 1989 and 31, 1989 and 24, 1989 <br /> number (spring) (summer) (fallj (winter) (sprir. ,S` (summer) ' <br /> PR-1 ND ND f 6.4 ND ND ND _ <br /> PR-2ND ND ND ND 1':A ND <br /> BHD-1 4,000 6,050 31,870 NA T 2,900 1,450 <br /> BHD-2 NA NA NA ND NA ND <br /> E-2 NA NA 79 t 300 638 85 <br /> E-4 NA NA NA 753 NA <br /> v 570 <br /> 5'NA _ ._ 12690"-'NA ---._. 580__._-- ---- --- - --'`-1}770------------ ---. � 2'NA ...- ^3NA �� � • <br /> NA <br /> 2,330 <br /> E-7 NANA NA 368. NA v' 1.5 <br /> ;• . <br /> E'$ _ 160 ?27I.- _— - `�21 '��27 r�132 T535. s i <br /> E-9 1,940 - .F, <br /> t 4,700 � 780 11.900 NA v 690 <br /> E-10 NA NA 2,780 7 2,970 ?5,520 x2,590 <br /> E-11 NA �r <br /> NA 440 4400 1437 yI60 <br /> ;;. E-12 NA _ �NA �{]_ 2121__------_ <br /> - -------T 150-- --- <br /> Note: ND = nondetectable: NA = not analyzed <br /> ?, <br /> ;k <br /> - d <br /> A �'1 <br />